package com.itheima.interceptor;

import com.itheima.utils.JwtUtils;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

/**
 * @author 何景航
 * @date 2025/11/1 10:09
 */
@Slf4j
@Component
public class TokenInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //1.获取到请求路径
        String requestURI = request.getRequestURI();

        //2.判断是否为登录请求
        if(requestURI.contains("/login")){
            return true;
        }

        //3.获取请求头中的token
        String token = request.getHeader("token");

        //4.判断token是否为空,如果为空，返回401
        if(token == null || token.isEmpty()){
            log.info("令牌为空，响应401");
            response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
            return false;
        }

        //5.判断token是否正确,(解析token)
        try {
            JwtUtils.parserToken( token);
        } catch (Exception e) {
            log.info("令牌非法，响应401");
            response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
            return false;
        }

        //校验通过，放行
        log.info("令牌合法，放行");
        return true;
    }
}
